Featherstone became a Lib Dem councillor in 1998 and entered the Commons as MP for Hornsey and Wood Green at the third attempt in 2005. She was junior home affairs spokesperson and has also briefly been the party's international development spokesperson.
WHAT IS HER BACKGROUND?
Her parents started the Ryness chain of hardware shops in London. She was born and raised in her constituency in north London, attending South Hampstead High School before Oxford Brookes University. She previously held a variety of jobs including boss of a design company.
WHERE DOES SHE SIT POLITICALLY?
Featherstone never rebels against her party but failed to vote on equality legislation in 2007. Also in 2007, she helped run the unsuccessful leadership campaign of Chris Huhne - who is seen as being to the left of Lib Dem leader Nick Clegg.
WHY SHE IS ONE TO WATCH
She was shortlisted in the 'Rising Stars' category for the 2006 Channel 4 Political Awards and her blog has twice been nominated for the New Statesman New Media Awards. Last year, she was promoted by some as a potential Lib Dem candidate London mayor but ruled herself out. Maybe next time?
SOMETHING I DIDN'T KNOW
In 2008, a Sky News poll of MPs named her the fifth most fanciable MP in the UK.